diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index 297792aeec..59467636d7 100644
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -549,7 +549,7 @@ module ActiveRecord
     end
 
     # Returns a consistent, platform-independent identifier for +label+.
-    # Identifiers are positive integers less than 2^32.
+    # Identifiers are positive integers less than 2^30.
     def self.identify(label)
       Zlib.crc32(label.to_s) % MAX_ID
     end